Ever since she first stepped out at the U16 European Championship Women back in 2008, Casas has shown a winner's mentality, clinching a medal in every one of the six youth championships she competed in. Her latest addition to her trophy case was a gold medal at the the U20 European Championship Women last summer, as Spain defended their title. She led the team in scoring and averaged a competition-high 3.1 steals, earning a spot on the All Tournament Team. She then enjoyed a remarkable debut season in EuroLeague Women, spending over 20 minutes-per-game on the court for Rivas Ecopolis and producing a string of eye-catching displays. She is electric when on top of her game and possesses amazingly quick hands which give her a valuable propensity to come up with key steals and finish off plays in transition.